Locking device



March 29, 1932.

A. MAYER 1,851,678

LOCKING DEVICE Filed July 29, A1929 Patented Mar. 29, 1932 AUGUSTINE MAYER, or

LOCKING DEVICE i Application 1ed July 29,

My invention consists in anew and useful improvement in locking devices and is designed to provide a device for locking wire, rods, or bolts in adjusted position, and is intended more particularly for use upon tie rods used on concrete forms. My device is attached on the tie rod to lock it in the desired position to tie the forms, and it can be easily and quickly removed after serving its purpose, and can be used repeatedly, as it is not damaged by its application or its removal from the rod. The particularly novel and useful featurel of my device is the fact that it can be easily adjusted in llocking posi- Y tion on the rod and can easily be removed therefrom. I have produced a novel -form for my device to facilitate its use, the various novel parts being so designed and disposed as to increase the eliieiency and durability of the device. f

While I have illustrated in the drawings filed herewith and have hereinafter fully described one specific embodiment of my invention, it is to be distinctly understood that I do not consider my invention limited to said embodiment, but refer for its scope to the claims appended hereto.

In the dra-wings:

Fig. lis a side elevation 'showing a pair of 80 my devices applied to a tie rod.

Fig. 2 is a vertical section on the line 2 2 of Fig. 3.

Fig. 3 is an end elevation.

Fig. 4 is a horizontal section on the line 4--4 of Fig. 2.

As illustrated in the drawings, my device.l

comprises a body 1 which consists of a single casting, lhaving parallel end walls 2 and 3 and a top wall 4 at right angles to the walls 2 and.

o 3. The bottom wall 5 of the body 1 is inclined upwardly from the wall 2 toward the v wall 3. The body l has an oblique face 6 between the top wall4 and the end wallS, the

purpose of which will presently be explained The body 1 has a transverse passage 7, the

upper wall 8 of which is parallel'with the top A y 5 having peripheral teeth 11 and of a diameter suciently large, as to prevent its discharge from the passage 7 at its end adjacent wall 3. Suitably disposed in ears 12 positioned on the wall2 on either side of the passage 7 there is a Cotter pin 13 on which is mounted 55: a spring 14 having its ends 15 bearing against a second pin 16 in the ears 12 and its loop 17 bearing against the roller 10 tending to urge said roller 10 upwardly along the wall 9 of the passage 7. 603

As illustrated in the drawings, I apply one of my locking devices to each end of'a rod RV which passes through the forms F and collars C. I insert a forked wedge between the collar C and locking device, the oblique face 6 facilitating this insertion. It is obvious from Fig. 2 that the loc-king device ,can be moved along the rod R toward the form F, the spring 14 yielding to permit the roller 10 to move downwardly and outwardly to accommodate the rod R through the pas# sage 7 and against the `wall 8. When the lock-` ing device is iiush Vwith the collar C, the wedge W is vdriven downwardly, the rod R being received in the crotch of the wedge W. It isr obvious that `the action of the spring 14 forcing the roller 10 between the wall 9 and the underside of the rod R prevents movement of the locking device relative to the rod R in the direction away from the form F. Thus the wedge W tends to force the locking device and with it the rod R away from the form F, and thus cause the rod Rl to tie` the forms F as desired.

While I use two of my locking devices, the use of two wedges is optional, as the effect can vbe obtained by the use of a single wedge.

When the forms are tobe removed, the wedges W are driven out, the rod R is cut between the collars C and the locking devices, and the loose ends of the rod R'can be drawn out from the locking devices.

Having described my invention, what Iy claim is:

l; In a device for locking rods, the com-V` bination of a casing having a transverse tapering slot; a pair of ears extending from Y,

vtwo walls of said casingv and disposed' one ion'eachside of said slot; two pins received 199 through said ears; a spring coiled upon one of said pins, and oneV of its ends bearin against the other pin; and a roller so dispose in said slotted casing as to be urged by the other end of said spring toward the diminishing end of said slot.

2. In a device for looking rods, the combination of a casing having a slot; a pin so mounted on said casing as to be disposed across the mouth of said slot; a spring mounted on said pin; and a gripping member so disposed in said slot as to be pressed by said spring.

In testimony whereof I afx my signature.

AUGUSTINE MAYER. 

